Comparison

zkMe vs Opacity

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

zkMe

This app uses zero-knowledge technology to verify credentials without revealing personal information. It allows users to prove eligibility for services by answering yes/no questions about their data, ensuring privacy and control.

Highlights
  • Zero-knowledge credential verification
  • Decentralized and private-by-design
  • Proves eligibility without disclosing PII
  • Self-sovereign data control
  • Generates mathematical zero-knowledge proofs
  • Verifies age without revealing birthday
Features
Read full description

———— You, privately verified ———— zkMe verifies user credentials without disclosing any personal information to anyone! Through the use of innovative zero-knowledge technologies, it is the only KYC solution to be fully decentralized, private-by-design and compliant with global AML requirements. ———— Why is zkMe the ultimate tool to protect your privacy? ———— Unlike other eVerification solutions, the zkMe app actually does not share any personal identifiable information (PII) to anyone. By generating mathematical zero-knowledge proofs of knowledge (ZKP), the zkMe app only discloses yes/no answers to a list of predetermined eligibility questions on your credentials. For example, by using the zkMe app, you can prove you are over 18, without disclosing your actual birthday. ———— zkMe got you covered ———— Shield your Privacy - No credential verified through the zkMe app is stored on any centralized storage, making it virtually impossible for any private data leak. The only thing shared (if authorized by you) are yes/no answers to basic eligibility questions such as "are you over 18 years old?". Be Self-Sovereign - The zkMe app puts you in control of any and all sharing of your data, even if that data is anonymized through the use of zero-knowledge. You see and control which proofs have been generated and are active, which chain ecosystems these proofs are being used in and which applications have authorization to verify your eligibility. 3 easy steps to protect your identity online: - Verify credentials and generate ZK proofs - Connect your proofs to the ecosystems you are active in - Authorize the services you want to present proofs to Download the zkMe app to get your journey started today.

About

Opacity

Securely store and manage your digital identity, including logins and credentials. Prove facts about yourself without revealing sensitive data, and share verified information with full transparency. Maintain control over your online presence and reputation.

Highlights
  • Private, verified identity vault
  • Store logins and credentials
  • Prove identity facts without data exposure
  • Share verified information transparently
  • Connect and manage accounts
  • Build online reputation
Features
Read full description

Opacity is your passport to a user-owned internet. Store your digital identity — logins, credentials, and connected accounts — in a private, verified vault that only you control. Prove facts about your identity without exposing your data. Opacity lets you verify who you are and what you’ve done while keeping your information private and secure. Share what you want — instantly, with full transparency into what’s being shared and with whom. You stay in control, whether you’re connecting accounts, proving your credentials, or porting your reputation across the internet. How it works: • Add accounts like GitHub, Spotify, and more • Verify data (e.g. commit history, top 1% listener) • Share proof anywhere — no need to reveal your full profile Own your identity. Build your reputation. Stay private.

Screenshots

zkMe4 screens
Opacity4 screens

Verdict

The call

The clearest difference is rating: Opacity at 5.0 against zkMe's 3.4. zkMe's advantage is iOS requirement (15 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Opacity holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 8 level
zkMe versus Opacity: the parameters behind the verdict, then further details
ParameterzkMeOpacity
PriceFreeFree
Rating3.4 (5 ratings)5.0 (3 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings5 — better3
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS15 — better17.0
Further details — not scored
Size211 MB74 MB
Age rating17+4+
DeveloperzkMe Technology LimitedOpacity Labs

Customer experience

zkMe

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Opacity

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

zkMe

No in-app purchases

None

Opacity

No in-app purchases

Questions

Is zkMe free?
zkMe is free to download, with no in-app purchases.
Is Opacity free?
Opacity is free to download, with no in-app purchases.
Which has better reviews, zkMe or Opacity?
Opacity is rated higher. zkMe averages 3.4 out of 5 from 5 ratings, while Opacity averages 5.0 from 3 ratings.
Do zkMe or Opacity have ads?
Neither zkMe nor Opacity shows ads.
Which is updated more often, zkMe or Opacity?
zkMe ships an update every 2 weeks, and Opacity every 2 weeks. Most recently, zkMe was updated on October 5, 2026 and Opacity on October 3, 2026.

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